Steam Humidifier
EHUMD800ASM00BA / EHUMD800BSMLCBA
TABLE OF CONTENTS
Safety Cautions..........................................2
Materials List ...........................................3
Principles & Sequence of Operation.......................3
Specifications & Dimensions .............................4
Installation Instructions ..................................7
Choosing a Location .....................................7
- Dispersion Tube Location ..............................7
- Elevation ...........................................8
- Distance from Humidifier to Dispersion Tube ..............9
- Humidifier Location..................................10
Prepare Humidifier for Mounting ..........................11
Install Steam Dispersion Tube ............................11
Mount Humidifier ......................................11
Install Steam Hose .....................................11
Supply Water..........................................11
Drain Line.............................................12
Electrical Power Wiring & Shut-off Switch ..................12
Control Wiring .........................................17
Start-up Procedure .....................................19
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Shut Down Procedure...................................20
Display Panel ..........................................20
Maintenance...........................................21
Troubleshooting Guide ..................................23
Steam Humidifier
Installation & Maintenance Instructions
Trane
6200 Troup Highway • Tyler, TX 75711-9010
READ AND SAVE THESE INSTRUCTIONS
18-CH87D1-1D
10016618 B2210106A 10.22
CAUTION
ATTENTION INSTALLER
Read this manual before installing. This product must be installed by qualified HVAC and electrical contractors and in
compliance with local, state, federal, and governing codes. Improper installation can cause property damage, severe personal
injury, or death as a result of electric shock, burns, or fire.
Read all cautions and instructions.
Read this manual before performing service or maintenance procedures on any part of the system. Failure to follow all cautions
and instructions could produce the hazardous situations described, resulting in property damage, personal injury, or death.
Failure to follow the instructions in this manual can cause moisture to accumulate, which can cause damage to structure and
furnishings.
HOT SURFACES AND HOT WATER
This steam humidification system has extremely hot surfaces. Water in steam canister, steam pipes, and dispersion tube can
be as hot as 212°F (100°C). Discharged steam is not visible. Contact with hot surfaces, discharged hot water, or air into which
steam has been discharged can cause severe personal injury. To avoid severe burns, follow procedures in this manual when
performing service or maintenance procedures on any part of the system.
DISCONNECT ELECTRICAL POWER
Disconnect electrical power before installing supply wiring or performing service or maintenance procedures on any part of
the humidification system. Failure to disconnect electrical power could result in fire, electrical shock, and other hazardous
conditions. These hazardous conditions could cause property damage, personal injury, or death.
Contact with energized circuits can cause property damage, severe personal injury, or death as a result of electrical shock or
fire. Do not remove access panels unless electrical power is disconnected.
Follow the shutdown procedure in this manual before performing service or maintenance procedures on any part of the system.
ELECTRICAL SHOCK HAZARD
If the humidifier starts up responding to a call for humidity during maintenance, severe injury or death from electrical shock could
occur. Follow the procedures in this manual before performing service or maintenance procedures on this humidifier.
EXCESSIVE SUPPLY WATER PRESSURE
Supply water pressure greater than 120 psi may cause the humidifier to overflow.
SHARP EDGES
Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling ductwork.
EXCESS HUMIDITY
Do not set humidity higher than recommended. Condensation may cause damage to structure and furnishings.
SAFETY CAUTIONS
2
MATERIALS LIST
MATERIALS FURNISHED WITH MODEL
EHUMD800ASM00BA / EHUMD800BSMLCBA
Humidifier
Manual humidistat and blower activation relay
Dispersion tube
Steam hose (6 feet)
7/8” I.D. drain tubing (10 feet)
Hose clamps
Saddle valve
Mounting screws
The Steam Humidifier delivers humidity in the form of
steam to the conditioned space via the HVAC system
duct. The humidifier generates steam by energizing two
electrodes that extend into a canister of water. Current
flowing between the electrodes causes the water to boil,
creating steam. Water is introduced to the humidifier
through a fill valve to a fill cup located in the top of the
cabinet. The fill cup serves as an overflow reservoir and
provides an air gap between the humidifier and water
source. The steam canister is filled from the bottom. The
canister is seated in a drain cup assembly which includes
a drain valve. The drain and fill valves work together to
maintain water level in the canister to deliver the rated
steam capacity based on the electrical conductivity of
the water and to temper drain water. See Figure 1 for
representation of fill and drain system and canister.
To control the Steam Humidifier as part of the HVAC
system, a Connected Thermostat Control with an integral
humidistat is installed to detect the RH level in the duct.
When the humidistat detects RH below the set point, and
the humidifier and HVAC system blower are operating,
the humidifier energizes the electrodes to provide steam.
Steam is delivered into the duct work via the steam hose
and through the dispersion tube. The dispersion tube
is fitted with opening called “Tubelets™”. The design of
the dispersion tube and Tubelets distribute steam over a wide area in the duct and direct any condensed moisture back into the steam hose. A
blower activation relay is included to turn on the HVAC system blower to maintain the proper RH level even when the furnace or air handler is in
stand-by mode. When using a Connected Thermostat Control with the Steam Humidifier, the provided manual humidistat and blower activation
relay are not used.
PRINCIPLES & SEQUENCE OF OPERATION
FIGURE 1 – Fill and Drain System and Canister
Steam Hose
Dispersion T
ube
in Duct
Tubelets
Steam
Outlet
Drain
Supply
Water
Drain Cup
Drain Valve
Canister
Electrodes
High Water Level Sensor
Inlet
Fill V
alve
Overflow
Fill
90-1522
NOT FURNISHED
Main power disconnect switch
Wiring
1/4” O.D. supply water tubing
Boards for mounting (if required)
3
SPECIFICATIONS & DIMENSIONS
This humidifier is able to produce steam at various capacities depending on the voltage and current applied. The unit can be wired to use an
input voltage of 120, 208 or 240 Volts and input amperage can be set to 11.5 or 16.0 amps by changing a dip switch on the control circuit board
(see the Electrical Power Wiring & Shut Off Switch section on page 12). Configure the unit appropriately for the application (see Table 1 for
capacity specifications).
TABLE 1 – Humidifier Capacities and Recommended Home Sizes
Amperage Voltage Maximum steam
capacity (gal/day)
Maximum recommended home size in ft2*
Tight Average Loose
11.5
120V 11.5 2,500 sq ft 1,500 sq ft 1,000 sq ft
208V 20.5 4,500 sq ft 2,500 sq ft 1,500 sq ft
240V 23.3
16.0
120V 16.0 3,500 sq ft 2,000 sq ft 1,500 sq ft
208V 30.0 6,000 sq ft 4,000 sq ft 2,500 sq ft
240V 34.6
* Assumes 8 ft ceiling height, adjust as necessary for higher ceilings. For homes with multiple furnaces/air handlers a humidifier should be installed on each.
Steam Humidifier Shipping Weight: 28 lbs
Humidifier Operating Weight: 23 lbs**
** As minerals precipitate unit weight can increase to approximately 30 lb.
4
3-3/8
7-7/8
8-7/8
3-3/8 1-5/8
4-1/4 5-3/4
Dispersion Outlet
Electrical Knockouts
Fill Cup
TOP VIEW
7-1/8
SIDE VIEW
1
4
4
12
BACK VIEW
Mounting
Holes
3-3/8
3-3/8
7-7/8
2
6-5/8
9-1/8
1-7/8
Water
Fill Line
Connection
Drain
BOTTOM VIEW
Electrical
Knockouts
3 sq
2 sq
1-3/4
8-1/4
1 dia
10-1/8
20-7/8
FRONT VIEW
FIGURE 2 – Humidifier Dimensions (inches)
90-1518
SPECIFICATIONS & DIMENSIONS (CONTINUED)
3-3/8
7-7/8
8-7/8
3-3/8 1-5/8
4-1/4 5-3/4
Dispersion Outlet
Electrical Knockouts
Fill Cup
TOP VIEW
7-1/8
SIDE VIEW
1
4
4
12
BACK VIEW
Mounting
Holes
3-3/8
3-3/8
7-7/8
2
6-5/8
9-1/8
1-7/8
Water
Fill Line
Connection
Drain
BOTTOM VIEW
Electrical
Knockouts
3 sq
2 sq
1-3/4
8-1/4
1 dia
10-1/8
20-7/8
FRONT VIEW
Steam Dispersion Tube
90-1518
5
SPECIFICATIONS & DIMENSIONS (CONTINUED)
Minerals that are naturally found in water contribute to water’s electrical conductivity; water conductivity is measured in microsiemens per
centimeter (uS/cm). Mineral content, also described as “water hardness” is usually measured in grains per gallon. Variation is found among
water samples but generally the higher the mineral content, the higher the conductivity.
The Steam Humidifier is designed to operate on water with conductivity between 100 and 1,250 uS/cm. This correlates loosely with water
hardness between 3 and 36 grains/gallon. Water that is considered “hard” and softened water work well in the Steam Humidifier. The humidifier
makes steam when plumbed to low-conductivity water but it takes longer to reach nominal current.
Two canisters are available for use with the Steam Humidifier. The Model 8043RP canister is used in most installations and is optimized for
“hard” and softened water. The Model 8043RP typically works best when the Steam Humidifier is installed at 208 or 240 VAC. If the Steam
Humidifier has a yellow steam light in the first two weeks of running with a new canister, the Steam Humidifier is taking a long time to reach its
nominal current; changing to the Model 8043LCRP canister will prevent this from happening in the future.
The Model 8043LCRP canister is optimized for use in areas where the water conductivity is less than 300 uS/cm or when the Steam Humidifier is
installed at 120VAC. The Model 8043LCRP should not be used with softened water. If the Steam Humidifier is draining too frequently, the water
conductivity is too high; changing to the Model 8043RP canister will reduce the drain frequency.
As water in the canister boils and turns into steam, minerals are left behind. Minerals remaining in solution increase the conductivity of the
water. Minerals also deposit onto the submerged portions of the electrodes rendering those areas ineffective. As this occurs, the level of water
in the canister rises to expose uncoated electrode surface.
There are benefits and trade-offs to consider when the application allows a choice between hard and softened water:
Hard water: The benefit of hard water is less frequent draining and filling than with soft water, which results in better energy and water
efficiency and more consistent steam output. However, canister replacement could be more frequent with hard water, because mineral deposits
coat the electrodes. The harder the water, the more frequent the need for a new canister.
Softened water: The benefit of softened water is longer canister life (depending on water chemistry) than with hard water, because softened
water does not coat the electrodes nearly as much as hard water. However, softened water ions stay in solution to much higher concentrations
than hard water ions. This requires more frequent draining and filling, which results in lower energy efficiency, higher water consumption and
less consistent steam output.
TABLE 2 – Water Quality Guidelines
Conductivity
(uS/cm) Grains/Gal Hardness Recommended Canister by Voltage
120VAC 208VAC 240VAC
75-100 0-3 Naturally Soft Installation Not
Recommended 8043LCRP 8043LCRP
100-300 3-9 Naturally Soft 8043LCRP 8043LCRP 8043LCRP
300-500 9-15 Slightly Hard 8043LCRP 8043RP 8043RP
500-650 15-20 Moderately Hard 8043LCRP 8043RP 8043RP
650-850 20-25 Hard 8043LCRP 8043RP 8043RP
850-1250 25-36 Very Hard 8043LCRP 8043RP 8043RP
above 1250 above 36 Extremely Hard Installation Not Recommended
Softened 8043RP 8043RP 8043RP
WATER QUALITY
6
CHOOSING A LOCATION
DISPERSION TUBE LOCATION
When choosing a location for the dispersion tube three things must be considered: location in duct, elevation with respect to the humidifier, and
distance from humidifier to dispersion tube.
Duct Location and Absorption Distance
Absorption distance, the unobstructed straight line distance needed for steam to be fully absorbed, is dependent on air velocity, air temperature
and relative humidity in the duct. Determine absorption distance based on the lowest duct temperature, lowest air velocity and
highest humidity that the system will experience. The dispersion tube must be located in a straight section of duct far enough upstream of
any obstructions or bends in the duct. Use Table 3 to determine the appropriate absorption distance.
Operation during AC calls is not recommended because of the potential for condensation in the ductwork. Configure controls to lock out the
humidifier during AC calls and use the blower activation feature to allow the humidifier to run with the blower only.
The dispersion tube must be mounted with the plate on a vertical surface with the tube angled up as shown in Figure 3. The steam tubelets
must face up regardless of the airflow direction in the duct. The plate is labeled “UP”to indicate proper orientation. On horizontal duct runs
install the dispersion tube low in the duct, on vertical runs center the tube on the duct.
If the dispersion tube is mounted on insulated ductwork, make sure insulation is not more than 2” thick at tube location to prevent insulation
from blocking first steam outlet.
Note: If dispersion tubes for two humidifiers are installed in one duct, double the dispersion distances. If three dispersion tubes are installed,
triple the dispersion distance. Position dispersion tubes so one does not discharge directly onto another.
INSTALLATION INSTRUCTIONS
Do not mount humidifier in a location where operating ambient temperatures exceed 140°F or where freezing temperatures
may occur.
7
CAUTION
Each humidifier requires its own steam hose and dispersion tube. Do not connect steam hoses from more than one humidifier
together. Back-pressure from one humidifier can lower the water level in the canister in the other humidifier and cause
operational problems.
Do not install the dispersion tube in a duct with greater than 2 in. wg static pressure. High duct pressure can cause back-
pressure in the canister which can result in unstable unit operation.
TABLE 3 – Absorption Distance (Minimum distance from dispersion tube downstream to any obstruction or bend in duct)
Humidifier
Output (gal/day) Airflow Velocity* 70°F & 30% RH
Setpoint 70°F & 45% RH
Setpoint 65°F & 45% RH
Setpoint 45°F & 45% RH
Setpoint
Up to 16.0
300 fpm 13” 19” 23” 30”
600 fpm 6” 10” 12” 18”
1200 fpm 3” 5” 6” 13”
1800 fpm 2” 3” 4” 10”
20.5 – 25.0
300 fpm 15” 23” 28” 45”
600 fpm 6” 12” 13” 26”
1200 fpm 5” 6” 7” 19”
1800 fpm 3” 4” 5” 16”
25.0 – 35.0
300 fpm 24” 31” 36” 60”
600 fpm 17” 22” 26” 48”
1200 fpm 12” 15” 18” 25”
1800 fpm 10” 13” 15” 20”
*Velocity in feet per minute = Duct airflow volume in cubic feet per minute / duct area in square feet.
Example: 1,200 cfm through 16” x 12” duct = 1,200/(12 x 16/144 sq. in./sq ft.) = 1,200/1.333 = 900 fpm
INSTALLATION INSTRUCTIONS (CONTINUED)
ELEVATION
The preferred location for the dispersion tube is higher than the
humidifier so that the steam hose has a constant downward slope of at
least 2” per foot from the dispersion tube to the humidifier. If hard pipe
is used, the slope can be 1/4” per foot. With the constant downward
slope, any condensation that forms in the steam hose will drain back
into the steam canister. See Figure 3.
FIGURE 3 – Dispersion Tube Mounted Above Humidifier
90-1704
90° long sweep
or two 45° elbows
Pitch*
Duct
Dispersion
tube
5” minimum
Steam hose or pipe.
Insulate pipe with 1” fiberglass
to reduce steam loss.
* Pitch steam hose down
from dispersion tube to
humidifier:
2”/ft (15%) minimum
when using steam hose.
1/4”/ft when using
hard pipe.
8
Pitch
Obstruction
90° long
sweep or two
45° elbows
6" min
8" min
Insulate hard pipe to
reduce steam loss
To
Dispersion
Tube
1" air gap
Open drain required,
see note 1.
Drip tee installation for
piping over obstruction,
or if dispersion tube is
lower than humidifier
.
NOTES:
1. Refer to governing codes for
drain pipe size and materials.
2. Support steam hose so there
are no sags or low spots.
Drip tee
Part #5628RP
Drain trap
FIGURE 4 – Dispersion Tube Mounted Below Humidifier
90-1703
FIGURE 5
90-1705
Steam Hose
Dispersion
Tube
Steam Hose
1-1/2" Hose Clamp
1-1/2" Hose Clamp
1" Copper Pipe
3/4" x 1"
Reducing Coupling
Humidifier
#5628RP KIT
CONTENTS:
Hose Clamps (5)
Trap (1)
Tee Assembly (1)
Steam Hose
1" I.D.
(Downward
Slope from
Humidifier
to T
ee) Tee
Assembly
Flared
End
Trap
Note: Prime with water
before using humidifier
Hose Clamp
Hose Clamp
Hose
Clamp
Hose Clamp
To Steam
Dispersion Tube
Steam
Hose
1" I.D.
Steam Hose, 1" I.D.
(Downward Slope to Tee)
Drain Hose
7/8" I.D.
Steam
Humidifier
FIGURE 6
90-1844
If the dispersion tube must be mounted below the humidifier or
if the steam hose needs to run up and over an obstruction, a drip
tee with drain trap, Part #5628RP, must be installed as shown in
Figure 4.
NOTICE
CONTROL CONDENSATE FLOW AND COLLECTION.
Failure to follow steam hose recommendations in this
manual can result in reduced or erratic performance,
increased noise and condensate in the duct.
DISTANCE FROM HUMIDIFIER TO DISPERSION TUBE
The capacity of the humidifier is reduced by the length of
the steam hose or pipe due to condensation. The maximum
recommended length of steam hose is 6 feet. Use hard pipe
insulated with 1” thick insulation rated for 212°F or higher
for lengths greater than 6 feet. Table 4 provides humidifier
capacity with various lengths of steam hose and pipe. If 6-foot
steam hose does not reach from humidifier to dispersion tube,
splice in 1” copper pipe using 3/4” x 1” reducing couplings as
shown in Figure 6.
INSTALLATION INSTRUCTIONS (CONTINUED)
9
TABLE 4 – Steam Humidifier Capacity in Gallons/Day
Steam
Hose or
Insulated
Pipe
Length
120 Volts 208 Volts 240 Volts
11.5 Amps 16.0 Amps 11.5 Amps 16.0 Amps 11.5 Amps 16.0 Amps
Steam
Hose Insulated
Pipe Steam
Hose Insulated
Pipe Steam
Hose Insulated
Pipe Steam
Hose Insulated
Pipe Steam
Hose Insulated
Pipe Steam
Hose Insulated
Pipe
< 2 ft. 11.5 11.5 16.0 16.0 20.5 20.5 30.0 30.0 23.3 23.3 34.6 34.6
2 ft. 11 11 15.5 15.5 20 20 29 29.5 23 23 34 34
4 ft. 10 11 14.5 15.5 19 20 28 29.5 22 23 33 34
6 ft. 911 13.5 15 18 20 27 29 21 22 32 33
8 ft. 10 14 19 28 22 33
10 ft. 10 14 19 28 22 33
12 ft. 10 14 19 28 22 33
14 ft. 913 18 27 21 32
16 ft. 913 18 27 21 32
18 ft. 913 18 27 21 32
20 ft. 913 18 27 20 31
HUMIDIFIER LOCATION
Do not mount humidifier in a location where operating
ambient temperature exceeds 140°F or where freezing
temperatures may occur. Extreme temperatures may cause the
humidifier to leak which can damage furnishings or structure.
Mount humidifier in a location that allows access for servicing, and
clearance to remove front panel for replacing the canister and side
panel for access to the electrical components during installation.
See Figure 7 for minimum clearances around humidifier.
The humidifier should be mounted as close to the dispersion
tube as possible. Table 4 shows how capacity is reduced as the
distance between the humidifier and dispersion tube increases. If
the humidifier is mounted on the duct directly below the dispersion
tube, allow space for a bend in the steam hose. Allow a minimum
of 2” of steam hose to extend straight out of the humidifier before
beginning any bends; this will help ensure a tight connection with
the top of the canister.
The humidifier can be mounted to a wood surface, or to sheet
metal ductwork if it is structurally stable. Do not mount humidifier
to fiber duct board. Sound isolation may be desired when mounting
to sheet metal ductwork.
The humidifier must be mounted to a vertical surface and must be
mounted level in the upright position.
INSTALLATION INSTRUCTIONS (CONTINUED)
16" for
Steam
Hose
30" for
Service
Access
16" for
Electrical
Access
4"
16"
for Drain
FRONT VIEW
SIDE VIEW
FIGURE 7 – Clearances
90-1702
10
SUPPLY WATER
Plumb the humidifier to cold, hard or softened water. Do not use hot water because unheated supply water is used to cool water
draining from the humidifier. Do not use demineralized or reverse osmosis water. For proper operation, supply water pressure must be between
25 psi and 120 psi. Hard or softened water may be used provided it has conductivity between 125 microS/cm and 1250 microS/cm. See Table 2.
Supply water piping must be free of oils, lubricants, solder flux and other contaminants, which can cause foaming.
Follow local plumbing codes. An external backflow preventer may be needed.
Install the saddle valve according to the instructions printed on the bag, or install a tee with a shut-off valve to an accessible cold water pipe.
Run 1/4” copper tubing from the saddle valve/shut-off valve to the humidifier. Connect it to the fill valve. Double wrench to prevent leaking and
damage to valve. Addition of a stainless steel braided water line can help reduce valve noise.
Note: Adding an inline particulate filter can increase canister life in areas with high levels of suspended solids. DO NOT use filters that release
scale inhibitors, filters of this type can significantly decrease canister life.
PREPARE HUMIDIFIER FOR MOUNTING
Unpack carton. Open front panel by removing screw and lifting panel up and away from humidifier. Disconnect three wires from top of canister
by pulling straight up. The two large wires are the electrode conductors. The smaller wire is connected to the high water level sensor. Remove
canister by pulling it up and out of drain assembly. Remove two screws on right side of humidifier and lift side panel off housing to expose
electrical compartment.
MOUNT HUMIDIFIER
Secure humidifier to sturdy wall using screws provided, or to sheet metal duct. Humidifier initially weighs 23 lbs with a full canister, but will
increase in weight over time due to the precipitation of minerals inside the canister. Make sure mounting system will support weight. If mounting
to a stud-framed wall, install two spanner boards to studs and fasten humidifier to spanner boards. Make sure humidifier is mounted plumb.
INSTALL STEAM DISPERSION TUBE
Make sure steam dispersion tube is mounted higher than the humidifier so that condensation that forms in the steam hose runs back into the
canister. If the dispersion tube cannot be mounted higher than the humidifier or if the steam hose must extend up from the humidifier then down
to the dispersion tube due to an obstruction, a drip tee and drain trap system (Part #5628RP) must be installed as shown in Figure 4.
Drill a 1-1/4” diameter hole in a vertical surface of the duct at the location chosen for the dispersion tube. Position the dispersion tube so it is
angled up, regardless of airflow direction. UP is stamped on the mounting bracket to aid in proper installation. Secure with four sheet metal
screws provided.
INSTALLATION INSTRUCTIONS (CONTINUED)
Six feet of steam hose is provided with the humidifier. If the steam hose must be cut, use a hacksaw. If additional length is required, use
1” O.D. metal or copper pipe. Do not use PVC pipe for steam line. Insulate pipe with 1” thick insulation rated for 212°F or higher to reduce
steam loss. See Table 4 for humidifier capacity at various lengths of steam hose and pipe.
Use the steam hose provided. Other hoses may have impurities which can cause foaming in the canister. Foaming can cause water level
inaccuracies, reduced steam production and water sputtering into the duct. When using pipe, remove all traces of residual materials used to
connect the pipe to prevent foaming.
Verify that the O-ring is in place in the groove in the drain assembly. Dampen the O-ring with water (DO NOT use oil, grease, or any lubricant
besides water), then reinsert the canister with the caution label positioned toward the front of the unit.
Attach steam hose to dispersion tube and then to top of canister using hose clamps provided. Make sure steam hose has a constant slope of at
least 2” per foot between the dispersion tube and the humidifier. Any and every low spot in the steam hose or pipe must have a drip tee and drain
trap. Fill drain trap with water before making final connections. Support the steam hose in multiple locations over its span to prevent sagging.
Attach and fully seat the electrode conductors (interchangeable) and the high water level sensor wire to the top of the canister.
INSTALL STEAM HOSE
11
DRAIN LINE
Attach the 7/8” I.D. drain tubing provided to the drain assembly at the bottom of the humidifier. Secure with the hose clamp provided. Do not
over tighten.
Make sure the drain line has a constant downward slope from the humidifier to the drain and is not kinked or blocked.
If floor drain is not available, use condensate pump (Part #4856) to route water to a suitable drain. Provide at least 16 inches for of drain line
between the Steam Humidifier and the condensate pump.
Note: The humidifier uses cold water to temper drain water to less than 140°F.
INSTALLATION INSTRUCTIONS (CONTINUED)
ELECTRICAL POWER WIRING & SHUT-OFF SWITCH
All wiring must be installed in accordance with all governing electrical codes and with the wiring diagram provided inside the front panel.
Do not loop power wiring.
Do not use aluminum wire.
A safety grounding system that meets all governing electrical codes is required. The ground connection must be made with solid metal to metal
connections. Ground wire must be the same size as the power wiring.
With factory settings, the Steam Humidifier draws 11.5 amps +/- 10%. Use a minimum 20 amp dedicated circuit when installing to
operate at 11.5 amps. The Steam Humidifier can be set to draw 16.0 amps +/- 10% by repositioning dip switch #1 on the control
circuit board (see Figure 8). When set to 16 amps, use a minimum 25 amp dedicated circuit. For both applications, size wire
according to local codes.
The Steam Humidifier is shipped from the factory wired for 240 VAC operation, but it can operate on 120, 208 or 240 VAC. If using 120V or
208V, move the black/white jumper wire to the proper tab on the control circuit board. See Figures 9, 10, 11.
WIRING INSTRUCTIONS
Install disconnect switch (not provided) between line power source and humidifier.
Knock-outs for power wiring and low voltage control circuit wiring are provided.
Connect power and ground wiring as shown in appropriate wiring diagram.
• 240 VAC – Figure 9
• 208 VAC – Figure 10
• 120 VAC – Figure 11
Do not run high voltage power lines over internal circuit boards.
CAUTION
Only qualified electrical personnel should perform field wiring procedures. Improper wiring or contact with energized circuits
can cause property damage or severe personal injury.
12
INSTALLATION INSTRUCTIONS (CONTINUED)
Factory setting for
11.5 AMP nominal
operation.
Slide Dip Switch #1
to “ON” position
for 16.0 AMP
nominal operation.
LED D8
90-1959
FIGURE 8 – Control Circuit Board with Dip Switches
13
INSTALLATION INSTRUCTIONS (CONTINUED)
L2 / N
L1
GND
J8 J10 J16
J2
10
1
J5 J6
P4
P3
CONTROL CIRCUIT WIRING
HIGH VOLTAGE WIRING
HIGH VOLTAGE FIELD WIRING
DRAIN
VALVE
FILL
VALVE
DISPLAY PANEL
RIBBON CABLE
BLK
BLK
YEL
BLK YEL
TRANSFORMER POWER
JUMPER WIRE
BLK/WHT
WHT
RED
BLK
ORG
YEL
BLUE
MAIN POWER BREAKER
(NOT PROVIDED)
TRANSFORMER
J11
120
VAC
J13
208
VAC
J14
240
VAC
LOW VOLTAGE FIELD WIRING
SLOW BLOW FUSE
(5X20mm 5A)
ELECTRODE
WATER LEVEL
PROBE
ELECTRODE
STEAM CANISTER
P7
HUMIDISTAT
1
2
FAN PACK
CON1
RESIDENTIAL STEAM HUMIDIFIER
IS SHIPPED FROM THE FACTORY
WIRED FOR 240 VOLTS.
HUMIDITY CONTROL
(PROVIDED)
FAN PACK
(OPTIONAL)
DOOR SWITCH
ORANGE
DRY
CONTACT
POWER
TERMINAL
BLOCK
FIGURE 9 – 240 VAC Wiring Diagram when using Supplied Humidistat
90-1903
14
INSTALLATION INSTRUCTIONS (CONTINUED)
J8 J10 J16
J2
10
1
J5 J6
P4
CONTROL CIRCUIT WIRING
HIGH VOLTAGE WIRING
HIGH VOLTAGE FIELD WIRING
BLK
BLK
YEL
YEL
TRANSFORMER POWER
JUMPER WIRE
BLK/WHT
HUMIDITY CONTROL
(PROVIDED)
FAN PACK
(OPTIONAL)
DOOR SWITCH
ORANGE
DRY
CONTACT
YEL
BLUE
TRANSFORMER
J11
120
VAC
J13
208
VAC
J14
240
VAC
ELECTRODE
WATER LEVEL
PROBE
ELECTRODE
STEAM CANISTER
LOW VOLTAGE FIELD WIRING
P7
P3
WHT
RED
BLK
ORG
FAN PACK
HUMIDISTAT
1
2
RESIDENTIAL STEAM HUMIDIFIER
IS SHIPPED FROM THE FACTORY
WIRED FOR 240 VOLTS. MOVE THE
JUMPER WIRE TO TERMINAL J13
TO OPERATE AT 208VAC.
MAIN POWER BREAKER
(NOT PROVIDED)
L2 / N
L1
GND
DRAIN
VALVE
FILL
VALVE
DISPLAY PANEL
RIBBON CABLE
BLK YEL
SLOW BLOW FUSE
(5X20mm 5A)
CON1
POWER
TERMINAL
BLOCK
FIGURE 10 – 208 VAC Wiring Diagram when using Supplied Humidistat
90-1904
15
INSTALLATION INSTRUCTIONS (CONTINUED)
HUMIDITY CONTROL
(PROVIDED)
FAN PACK
(OPTIONAL)
DOOR SWITCH
POWER
TERMINAL
BLOCK J8 J10 J16
J2
10
1
J5 J6
P4
J11
120
VAC
J13
208
VAC
J14
240
VAC
CONTROL CIRCUIT WIRING
HIGH VOLTAGE WIRING
HIGH VOLTAGE FIELD WIRING
ORANGE
BLK
BLK
YEL
TRANSFORMER POWER
JUMPER WIRE
BLK/WHT
YEL
BLUE
TRANSFORMER
LOW VOLTAGE FIELD WIRING
DRY
CONTACT
P7
P3
WHT
RED
BLK
ORG
FAN PACK
HUMIDISTAT
1
2
RESIDENTIAL STEAM HUMIDIFIER
IS SHIPPED FROM THE FACTORY
WIRED FOR 240 VOLTS. MOVE THE
JUMPER WIRE TO TERMINAL J11
TO OPERATE AT 120VAC.
MAIN POWER BREAKER
(NOT PROVIDED)
L2 / N
L1
GND
DRAIN
VALVE
FILL
VALVE
DISPLAY PANEL
RIBBON CABLE
BLK YEL
SLOW BLOW FUSE
(5X20mm 5A)
CON1
ELECTRODE
WATER LEVEL
PROBE
ELECTRODE
STEAM CANISTER
FIGURE 11 – 120 VAC Wiring Diagram when using Supplied Humidistat
90-1905
16
INSTALLATION INSTRUCTIONS (CONTINUED)
CONTROL WIRING
The Steam Humidifier may be connected directly to the humidistat terminals on any Connected Thermostat Controls. If not using a Connected
Control, install manual humidifier control with the Blower Activation Relay. See Figures 13, 14, 15 for wiring options.
The control circuit operates on 24 VAC. Install manual humidifier control and blower activation relay as shown in Figure 12. If protection from
over-humidification is desired, install optional high humidity limit switch at least 4 feet downstream of the dispersion tube.
MANUAL
HUMIDIFIER
CONTROL
TYPICAL 24 VAC
TERMINAL STRIP
IN FURNACE THERMOSTAT
BLOWER ACTIVATION
RELAY
REMOVE WIRE
“G” TO “G”
HIGH HUMIDITY
LIMIT SWITCH
STEAM
HUMIDIFIER
(OPTIONAL)
NOTES:
1. 18AWG WIRE IS ACCEPTABLE FOR 24V INSTALLATIONS.
2. “FAN PACK” TERMINALS PROVIDE 24 VAC ON CALL FOR HUMIDITY AND REMAIN ENERGIZED FOR
TWO MINUTES AFTER CALL IS SATISFIED.
BLUE (NC)
ORANGE (NO)
YELLOW (C)
WHITE/YELLOW
WHITE/BLUE
FAN PACK HUMIDISTAT
FIGURE 12 – Wiring with Manual Humidifier Control
90-1706
17
INSTALLATION INSTRUCTIONS (CONTINUED)
HUMIDISTAT
HUM
HUM
Bk-PWM
G-FAN
STEAM HUMIDIFIER
24 VOLT RELAY PANEL
CIRCUIT
BOARD
AUX 2
AUX 1
AUX 2
AUX 1
Bk
WH/1
Bk/3
B/2k
{Bk
WH
LH
LN
BkWH
EAC {WH
Bk
HUMIDISTAT
STEAM HUMIDIFIER
CIRCUIT
BOARD
To 115V 1PH
60Hz power
supply
(per local codes)
110V ISOLATION
RELAY P/N
RLY00636
AUX 2
AUX 1
AUX 2
AUX 1
G
1/2
1/1
W2
Bk
W3
W1
RS1
ODT
RS1
ODT
B/C
RH
RC
O
HUMIDISTAT
STEAM HUMIDIFIER
824/624 CONTROL
CIRCUIT
BOARD
FIGURE 13 – Steam
Humidifier using 850
or 950 Control Wired
to 24 Volt Relay Panel
(BAY24VRPAC52D)
FIGURE 15 – Steam Humidifier Wiring for Communicating Furnaces using 110 Volt HUM Output from Furnace
FIGURE 14 – Steam
Humidifier Wired to
824 or 624 Control
90-2164
90-2166
90-2165
18
START-UP PROCEDURE
1. Once the supply water, drain, steam hose, electrical power and control wiring connections are complete, make sure canister is fully seated
into drain valve and three wire connectors on top of canister are secure. (High water probe wire and two interchangeable electrode wires.)
2. Attach side panel and front door.
3. Open saddle valve allowing water to flow to humidifier. Check for leaks.
4. Turn humidistat to OFF.
5. Close main power switch energizing humidifier.
6. Press “On/Off” button on humidifier. The “On/Off” light will illuminate green.
7. Make sure the HVAC blower is operating and adjust the humidistat to initiate a call for humidity.
The “Steam” light will illuminate green indicating a call for humidity and the “Fill” light will illuminate green indicating the fill valve is open
allowing the canister to fill. You should also hear the water flowing. If water flows down drain while humidifier is filling, check for
kinks or obstructions in the fill hose or fill cup and make sure the O-ring in the drain valve is properly seated in the groove and
not damaged or deformed.
8. Once the “Fill” light turns off, to verify that the humidifier will drain properly, press the “On/Off” button to turn humidifier off. You may hear
the fill valve open allowing cold water to flow into the canister to cool the water in the canister. The “Drain” light will flash green for 15
seconds then turn green for four minutes while the canister drains. Once the “Drain” light turns off, the drain cycle is complete.
9. Set the humidistat to proper level.
10. Press “On/Off” button to turn humidifier on.
When the humidifier is powered and turned on, the “On/Off” light is illuminated green.
During fill cycles, the “Fill” light illuminates green.
When the humidifier is turned on, any time the Humidifier Control sends a call for humidity, the “Steam” light illuminates green.
Any time the drain valve is activated, the “Drain” light illuminates green.
During initial start up with a new canister, the humidifier may run through a series of fill/drain cycles until the conductivity of the water is in
a range that allows the humidifier to generate steam at the rated capacity. If the conductivity of the water is low, it may take a week or more
for the humidifier to generate steam at the rated capacity. The rated capacity is achieved when the humidifier is detecting a nominal current
of either 11.5 or 16.0 amps between the electrodes. If the humidifier has not reached capacity after 168 hours of operation, the “Steam” light
will illuminate yellow on a call for humidity. The humidifier will continue to operate with a yellow “Steam” light, and may satisfy the humidity
requirements. Once rated capacity is reached, the “Steam” light will illuminate green.
The internal controller adjusts water level in the canister to maintain the nominal current between the electrodes. As minerals build up on the
electrodes, their effectiveness decreases, so the controller will increase the water level to submerge more of the electrode surface. When the
water has reached the high level probe in the canister and the internal controller no longer detects nominal current, the “Service” light will flash
red indicating that the canister needs to be replaced.
If the humidifier attempts to drain the canister and cannot, the drain and fill valves will pulse on and off for four seconds to dislodge minerals
which may be blocking the drain valve ports. The “Drain” and “Fill” lights will flash on and off when this occurs.
Any time power is disconnected or humidifier is turned off, the internal timer for start-up and drain cycles is reset.
If the humidifier has operated 168 hours without a drain cycle, the drain valve will open and drain the canister. Normal operation will continue.
If the humidifier is operating and a power failure occurs, once power is restored, the “On/Off” light will flash green for one minute, then the
humidifier will turn on.
OPERATING MODES
END OF SEASON/PERIOD OF INACTIVITY SHUT-DOWN
The humidifier does not need to be turned off at the end of the humidification season. If 72 hours elapse without receiving a call for humidity,
the canister will automatically drain. The “Drain” light will remain lit for 24 hours. This may also occur during periods of inactivity during the
humidification season. The humidifier will resume normal operation when a call for humidity is made.
19
To turn humidifier off, push “On/Off” button once. Humidifier will begin its four-minute drain cycle. Fill valve will open to temper drain water. The
“Drain” light will flash green for 15 seconds then turn solid green for four minutes while the canister drains. Once the “Drain” light turns off, the
drain cycle is complete and the humidifier is off.
SHUT DOWN PROCEDURE
DISPLAY PANEL
TABLE 5 – Display Panel
Indicator Light Function
Off Humidifier is turned off or power is disconnected.
Solid green Humidifier is turned on.
Flashing Green Humidifier is preparing to turn on. Occurs if power to humidifier was turned off when humidifier
was on. Humidifier turns on after light flashes for one minute.
Off Fill valve not energized.
Solid Green Fill valve is energized, filling or replenishing canister with water. (During drain cycle when fill valve
is open allowing cold water into canister to temper drain water, the “Fill” light does not illuminate.)
Flashing Green Fill and Drain Valves are pulsing to dislodge mineral deposits from drain. Flashes 10 times in 4
seconds. Occurs if high water probe detects water during drain cycle.
Solid Red Humidifier cannot fill canister. Humidifier stops operating. Occurs after fill valve has been energized
for 40 minutes and high water probe does not detect water.
Off Humidifier is not producing steam.
Solid Green Humidifier is turned on and receiving a call for humidity from the control.
Solid Yellow Humidifier is producing steam but at less than the rated capacity. Occurs if humidifier has operated
for 168 hours and has not reached nominal current.
Off Drain valve is not energized.
Solid Green Drain valve is energized, allowing water to drain from canister.
Flashing Green Humidifier is preparing to drain. Flashes for 15 seconds indicating fill valve is open allowing cold
water into canister.
Flashing Red
Canister has reached end of life. Humidifier continues to operate but at reduced capacity. Occurs
after humidifier has operated for 168 hours plus another 24 hours at less than 75% of the maximum
operating current level between electrodes.
Solid Red Humidifier is not operating and requires service.
Green lights indicate normal operation.
Yellow “Steam” light indicates humidifier is operating at less than rated capacity.
Flashing red “Service” light indicates canister is near the end of its life and should be replaced if the humidity in the space cannot be maintained.
Solid red lights indicate humidifier has shut down and requires service.
Disconnecting power to humidifier resets internal timers.
20
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
/
